US4719900A - Grate for use in industrial furnaces - Google Patents

Grate for use in industrial furnaces Download PDF

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Publication number
US4719900A
US4719900A US06/873,011 US87301186A US4719900A US 4719900 A US4719900 A US 4719900A US 87301186 A US87301186 A US 87301186A US 4719900 A US4719900 A US 4719900A
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openings
grate
top wall
extension
extensions
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Walter J. Martin
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H17/00—Details of grates
    • F23H17/12—Fire-bars

Definitions

  • the grate of the present invention constitutes an improvement over grates utilizing grate bars of the type disclosed in the copending patent application Ser. No. 763,880 of Johannes Josef Edmund Martin filed Aug. 8, 1985 for "Grate bar for use in industrial furnaces", U.S. Pat. No. 4,672,947.
  • the invention relates to grates in general, particularly to improvements in grates for industrial furnaces.
  • the invention also relates to improvements in grate bars which can be used in such grates to support and to admit oxygen into a layer of coal or other solid fuel.
  • a grate bar with a passage which admits atmospheric air into the fuel layer on the grate bar. It is also known to provide the grate bar with an upward extension having an opening for admission of air into the fuel layer. Rows of such grate bars are assembled into a grate which must prevent particles of fuel and/or combustion products from descending into the space below the grate because this could entail rapid contamination of the furnace by fuel, ashes, cinder and like substances and would interfere with movements of grate bars relative to each other. On the other hand, the grate should ensure a substantially uniform distribution of oxygen in the fuel layer on the top walls of the grate bars.
  • grates and grate bars cannot fully satisfy the above seemingly conflicting requirements, i.e., they either favor uniform distribution of oxygen while permitting a relatively large quantity of fuel and/or combustion products to descend through the grate or vice versa.
  • each opening advances directly into the adjacent mass of fuel and/or combustion products during rearward movement of the respective grate bar and/or during forward movement of the immediately following grate bar.
  • the mechanism which reciprocates the grate bars will cause particles of fuel and/or combustion products to penetrate into and to jam in the openings so that the rate of oxygen flow into the fuel layer is unduly affected with attendant reduction of the percentage of fully combusted fuel.
  • An object of the invention is to provide a novel and improved grate wherein the distribution of oxygen which is caused to flow into the fuel layer on the grate is more uniform than in heretofore known grates, even after extended periods of use.
  • Another object of the invention is to provide novel and improved grate bars for use in the above outlined grate.
  • a further object of the invention is to provide a grate whose bars are less likely to be clogged with particles of fuel and/or combustion products than the bars of conventional grates.
  • An additional object of the invention is to provide a furnace which embodies the above outlined grate.
  • Still another object of the invention is to provide a novel and improved method of admitting streams of oxygen into a layer of fuel on a composite grate which is assembled from rows of relatively movable grate bars.
  • a further object of the invention is to provide a grate bar which can be used in existing grates as a superior substitute for conventional grate bars.
  • Another object of the invention is to provide a novel and improved grate which can be used in existing furnaces as a superior substitute for conventional grates.
  • the invention is embodied in a grate, particularly for use in industrial furnaces, which comprises a grate bar including a top wall with a front end and a rear end, a front wall which extends substantially transversely of the front end of and downwardly from the top wall, and a pair of sidewalls which flank the top wall and extend downwardly from its marginal portions.
  • the sidewalls, the top wall and the front wall together define at least one air admitting passage
  • the top wall has at least one hollow upward extension which is adjacent the front end of the top wall and defines a portion of the passage.
  • the extension has at least two lateral openings which constitute outlets connecting the aforementioned portion of the passage with the surrounding atmosphere.
  • the extension can taper upwardly and/or its width can be less than the distance between the sidewalls of the grate bar.
  • the openings can be disposed in planes which make with the longitudinal direction of the top wall an angle of between approximately 80 and 90 degrees.
  • the openings can be inclined to the horizontal, either upwardly or downwardly.
  • the extension can be provided with nozzles having orifices which constitute the outlet openings.
  • Such orifices can be bounded by relatively smooth surfaces of the nozzles or by surfaces which are designed to swirl the streams of air flowing from the passage or passages into the surrounding atmosphere.
  • the dimensions of the openings transversely of the top wall can exceed the dimensions of the openings in the longitudinal direction of the top wall.
  • the top wall can be provided with two or more hollow extensions, and the openings in one of the extensions can be offset relative to the openings in another extension. Furthermore, the openings of each extension can be offset relative to each other.
  • Each extension can be provided with three or more openings, e.g., with two or more openings in each of its lateral portions. If the grate bar has several extensions, such extensions can be staggered relative to each other in the longitudinal direction of the top wall of the grate bar. The cross-sectional area of at least one opening can decrease in a direction from the passage portion in the extension toward the surrounding atmosphere.
  • Neighboring grate bars of a row of grate bars can be separably coupled to each other.
  • one sidewall of one grate bar can be placed next to one sidewall of the neighboring grate bar and such grate bars can be coupled to each other against movement of the abutting or neighboring sidewalls along each other. This can be achieved by providing one or more recesses in one of the two neighboring sidewalls and by providing the other sidewall of the two neighboring sidewalls with a projection which extends into the recess.
  • FIG. 1 is a fragmentary elevational view of a grate with two partially overlapping grate bars which are constructed in accordance with one embodiment of the invention
  • FIG. 2 is an enlarged transverse vertical sectional view of one of the grate bars as seen in the direction of arrows from the line II--II of FIG. 1;
  • FIG. 3 is a fragmentary longitudinal vertical sectional view of a modified grate bar
  • FIG. 4 is a transverse vertical sectional view of a third grate bar wherein the top wall has two extensions;
  • FIG. 5 is a fragmentary plan view of a row of grate bars which are constructed in accordance with additional embodiments of the invention.
  • FIG. 6 is a fragmentary transverse sectional view of two neighboring grate bars whose sidewalls are separably coupled to each other, the section being taken in the direction of arrows from the line VI--VI in FIG. 5.
  • FIG. 1 shows a portion of a grate which can be used in an industrial furnace and comprises several rows of partially overlapping grate bars 1.
  • the front end wall 5 of the right-hand grate bar 1 rests on a frame member of the furnace, and the front end wall 5 of the left-hand grate bar 1 rests on the median portion of the top wall 1a of the right-hand grate bar.
  • Each grate bar 1 further comprises two sidewalls or lateral walls 1b, 1c (see FIG. 2) which extend downwardly from the longitudinally extending marginal portions of the respective top wall 1a.
  • each top wall 1a has a hollow upward extension 2 which is adjacent its front end, i.e., at least reasonably close to the front wall 5.
  • the walls 1a, 1b, 1c, 5 together define an air admitting passage 3 which is open at its underside and/or at its rear end (as fully disclosed in the aforementioned copending patent application Ser. No. 763,880 whose disclosure is incorporated herein by reference), and a portion 4 of the passage 3 (see FIG. 3) is defined by the hollow extension 2.
  • the lateral portions 2a of the extension 2 are provided with outlets in the form of substantially or nearly horizontal openings 7 extending substantially transversely of the longitudinal direction of the top wall 1a. Air which enters the passage 3 from below or from the rear end of the respective grate bar 1 cools the grate bar and is thereupon admitted, via openings 7, into the mass of fuel resting on the grate.
  • FIG. 2 shows that the underside of the grate bar 1 is open to allow for practically unimpeded entry of cool air from below the grate.
  • FIG. 3 shows a modified grate bar 1' which comprises a relatively thin bottom wall 6 below the passage 3. The inlet for admission of air into the passage 3 of FIG. 3 is disposed at the (non-illustrated) left-hand end of the grate bar 1'.
  • the purpose of the extensions 2 is to cooperate with the front end walls 5 of the grate bars 1 in the next following row of grate bars so as to squash accumulations of slag, cinder, fuel or other solid material in response to longitudinal movement of grate bars in one of two neighboring rows relative to the grate bars in the other row.
  • a piece of cinder between the right-hand extension 2 of FIG. 1 and the front end wall 5 to the left of such extension will be comminuted in response to leftward movement of the right-hand grate bar 1 and/or in response to rightward movement of the left-hand grate bar 1.
  • Means for moving rows of grate bars relative to each other are well known in the art and form no part of the present invention. Reference may be had, for example, to U.S. Pat. Nos. 4,239,029, 4,520,792, 4,348,139 and 4,394,118.
  • the openings 7 discharge streams of air substantially transversely of the longitudinal direction of the respective top walls 1a.
  • the arrangement is preferably such that the openings 7 are disposed in planes which extend at right angles to the longitudinal direction of the respective top wall 1a, and the dimensions of each opening 7 are smaller in the longitudinal direction than in the transverse direction of the respective grate bar.
  • the openings 7 can discharge streams of air in directions which are inclined to the horizontal, and the inclination can be in the upward or in the downward direction.
  • the inclination of the aforementioned planes to the longitudinal direction of the grate bars can be in the range of approximately 80-90 degrees.
  • the openings 7 can discharge streams of air forwardly, rearwardly, upwardly or downwardly but generally in a direction transversely of the respective grate bars. Deviations in the range of up to and even in excess of 10 degrees (forwardly, rearwardly, upwardly or downwardly) from an optimum or standard direction (in a horizontal plane and exactly at 90 degrees to the longitudinal direction of the respective grate bar) are acceptable.
  • Each opening 7 can constitute a simple bore or hole having a constant diameter and bounded by a smooth surface of the respective extension 2.
  • one or more openings 7 can constitute the orifices of nozzles and the cross-sectional areas of such orifices can decrease in the direction of flow of air from the respective extensions 2 (this can be seen in the left-hand portion of FIG. 4 which shows a modified grate bar 1" with two extensions 2 disposed side by side).
  • An advantage of openings whose diameters increase in a direction toward the interior of the respective extension is that any solid particulate material which happens to penetrate in the openings is much more likely to descend into the major portion of the respective passage not later than in response to an interruption of the flow of air from the passage 3, into the passage portion 4 within the respective extension 2, through the opening 7 and into the layer of fuel on the grate.
  • FIG. 5 shows a centrally located grate bar 1A with three extensions 2 each of which has more than two transversely extending openings 7.
  • the centrally located extension 2 is staggered with reference to the two outer extensions in the longitudinal direction of the top wall of the grate bar 1A.
  • the centrally located extension 2 has two pairs of openings 7, the right-hand extension 2 has a pair of openings 7 in its left-hand lateral portion and a single opening 7 in its right-hand lateral portion, and the left-hand extension 2 has two openings 7 in its right-hand lateral portion but a single opening 7 in its left-hand lateral portion.
  • the openings 7 in any given extension 2, as well as the openings in the neighboring extensions of any given grate bar and/or the openings in the extensions of two neighboring grate bars are or can be distributed and oriented in such a way that streams of air issuing from one of the extensions 2 cannot interfere with streams of air which issue from the adjacent extension or extensions. All this can be seen in FIG. 5.
  • the right-hand opening 7 in the right-hand extension 2 of the rightmost grate bar 1B is staggered with reference to the left-hand opening 7 in the longitudinal direction of the top wall of such grate bar.
  • the right-hand opening 7 of the left-hand extension 2 in the rightmost grate bar 1B is staggered with reference to the left-hand opening 7 of the right-hand extension 2, and the left-hand opening 7 of the left-hand extension 2 of the rightmost grate bar 1B is staggered or offset with reference to the single opening 7 in the right-hand portion of the rightmost extension 2 of the centrally located grate bar 1A.
  • the same preferably applies for the openings 7 all other extensions 2.
  • FIG. 5 shows two grate bars 1C and 1D with forwardly and rearwardly inclined openings for streams of air (indicated by arrows X and Y) which do not clash but bypass each other so as to ensure predictable admission of oxygen into the layer of fuel on the grate utilizing the bars of FIG. 5.
  • FIG. 5 further shows that the width of individual extensions 2 on a grate bar or the combined width of all extensions on a grate bar can be less than the distance between the sidewalls of the respective grate bar.
  • the combined width of the extensions 2 on the rightmost grate bar 1b of FIG. 5 is less than the width of the top wall of such grate bar.
  • the width of the next-to-the-leftmost extension 2 (on the grate bar 1D) is also less than the width of the respective grate bar but the combined width of the three extensions 2 on the median grate bar 1A of FIG. 5 equals the distance between the outer sides of the corresponding sidewalls.
  • FIG. 5 also shows that the lateral surfaces of extensions can have different slopes.
  • One lateral surface can extend at right angles to the exposed upper side of the respective top wall whereas the other lateral surface slopes laterally toward the respective sidewall. This is shown in the left-hand portion of FIG. 5 (note the grate bar 1D).
  • the distribution and orientation of openings 7 in all or some of the extensions 2 is or can be the same if the extensions are staggered in the longitudinal direction of the respective top wall as shown in the middle of FIG. 5 because this also ensures that the streams of air issuing from the openings 7 do not interfere with each other.
  • the distribution of openings 7 in the two outer extensions 2 of the grate bar 1A of FIG. 5 is such that air streams issuing from the openings of neighboring grate bars which are identical with the grate bar 1A will not interfere with the streams issuing from the openings marked 7a and 7b.
  • the openings 7 can be bounded by surfaces having a circular, oval, polygonal or other cross-sectional outline. It is further possible to provide the extensions 2 with surfaces which cause the streams of air flowing through their openings to swirl in order to ensure more satisfactory distribution of oxygen in the layer of fuel and/or deeper penetration of oxygen into fuel. It is presently preferred to configurate the surfaces around the openings 7 in such a way that the openings are not long (as considered in the longitudinal direction of the respective grate bar).
  • extensions 2 can depart from those which are shown in the drawing without departing from the spirit of the invention. It is important to ensure that the grate bars be provided with a sufficient number of properly dimensioned and oriented openings 7 so as to guarantee a predictable and satisfactory admission of oxygen into the layer of fuel on the grate.
  • FIG. 2 shows that the right-hand sidewall 1b of the grate bar 1 has a recess 8 and that the left-hand sidewall 1c has a pin- or stud-shaped projection 9 which is receivable in the recess of the adjacent sidewall.
  • This simple coupling renders it possible to lock the neighboring grate bars against movement of their abutting sidewalls along each other.
  • the abutting sidewalls can be readily separated by moving them sideways and away from each other but they cannot slide along each other as long as the projection 9 in one of the neighboring sidewalls extends into the recess 8 of the other sidewall.
  • the coupling including the projection 9 and the recess 8 prevents a lifting of grate bars in an assembled grate but allows for accurate and predictable assembly of several grate bars into a row of abutting grate bars which are disposed side by side.
  • FIG. 6 shows a modified coupling which is used between the two leftmost grate bars 1C and 1D of FIG. 5.
  • This coupling comprises a discrete pin-shaped projection 11 which is received in registering recesses or apertures 10 of the neighboring sidewalls 1b, 1c of the corresponding grate bars.
  • the pin-shaped projection 11 of FIG. 6 also prevents a lifting of the left-hand or of the right-hand grate bar in a row of such grate bars.
  • An important advantage of the improved grate bars and of the grate which utilizes such grate bars is that the grate can admit into the fuel layer a large number of properly distributed streams of oxygen in directions such that the openings 7 which discharge oxygen are much less likely to be clogged by particles of fuel and/or by particles of combustion products than in heretofore known grates.
  • the number of openings 7 is large because each extension 2 has at least two openings and because the top wall of each grate bar can be provided with one, two or more extensions.
  • each opening 7 can be reduced to a small fraction of the cross-sectional areas of openings in conventional grate bars. This is due to the fact that each extension 2 has several openings 7 so that the quantity of oxygen which must be discharged through a single opening in a conventional grate bar can be discharged through two, three or more openings 7 in the grate bars of the present invention.
  • the openings 7 discharge streams of oxygen substantially transversely of the respective grate bars ensures that the furnace is less likely to incompletely combust certain types of fuel, for example, paper, lightweight plastic materials and the like.
  • fuel for example, paper, lightweight plastic materials and the like.
  • the streams of gaseous fluid issuing from the openings 7 flow sideways and cannot propel lightweight particles into the rear end of the furnace where the combustion of accumulated lightweight fuel is much less likely to be satisfactory than at the center of the furnace.
  • the lateral portions 2a of the extensions 2 do not travel directly against the adjacent masses of fuel and/or combustion products when the grate bars are in motion. Instead, the lateral portions 2a of the extensions 2 slide along the adjacent solid particulate material so that the solid particulate material is much less likely to penetrate into the openings 7 than in conventional grate bars wherein the outer ends of the openings are caused to move head on against the adjacent accumulations of solid particulate material and/or vice versa.
  • the aforediscussed configuration and orientation of openings 7 (so that the dimensions of the openings in the longitudinal direction of the grate bars are smaller than in the transverse direction of the grate bars) also contributes to a reduction of the likelihood of clogging of the openings with solid particulate material.
  • the provision of two or more extensions 2 on some or all of the grate bars entails a further increase in the number of openings 7 per grate bar so that the cross-sectional area of each opening can be reduced still further without reducing the quantity of admitted oxygen even though the uniformity of distribution of oxygen in the fuel layer is increased proportionally with an increase in the total number of openings.
  • Uniform distribution of oxygen in a fuel layer resting on the just described grate bars with plural extensions is attributable to the increased number of openings as well as to a reduction of the cross-sectional area of each opening in comparison with the openings of grate bars each of which has a single opening.
  • the number of openings 7 can be doubled by providing each grate bar with two extensions 2 and by providing each extension with two pairs of transversely extending openings.
  • the openings of such grate bars are even less likely to be clogged while ensuring a highly satisfactory distribution of oxygen in the fuel layer.
  • the distribution of openings in individual extensions, in two or more extensions of a given grate bar and/or in the extensions of neighboring grate bars can be selected practically at will as long as the stream issuing from any given opening does not interfere with streams which issue from the adjacent opening or openings.
  • the openings in neighboring grate bars of a row of grate bars can be staggered relative to each other in the longitudinal direction of the respective grate bars and/or otherwise (by being inclined downwardly, upwardly, forwardly and/or rearwardly) for the purpose of preventing interference between streams of oxygen and of ensuring predictable distribution of oxygen in the fuel layer or layers.
  • Coupling of neighboring grate bars in a row of grate bars is desirable and advantageous because this prevents accidental lifting of a grate bar and the resulting deviation of distribution of oxygen in the fuel from an optimum or preselected distribution.
  • a slightly or a fully lifted grate bar would permit large quantities of oxygen to enter the adjacent portion of a fuel layer while the neighboring portions of the fuel layer would receive a reduced quantity of oxygen or no oxygen at all.
  • the provision of coupling means between the neighboring sidewalls of grate bars in a row of grate bars is optional but is desirable and advantageous, especially in connection with the combustion of certain types of fuel.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Baking, Grill, Roasting (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Detergent Compositions (AREA)
  • Solid-Fuel Combustion (AREA)
US06/873,011 1985-06-13 1986-06-11 Grate for use in industrial furnaces Expired - Lifetime US4719900A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3521266 1985-06-13
DE19853521266 DE3521266A1 (de) 1985-06-13 1985-06-13 Roststab fuer einen feuerungsrost einer grossfeuerung und feuerungsrost fuer diese grossfeuerung

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US4719900A true US4719900A (en) 1988-01-19

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US06/873,011 Expired - Lifetime US4719900A (en) 1985-06-13 1986-06-11 Grate for use in industrial furnaces

Country Status (8)

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US (1) US4719900A (enrdf_load_stackoverflow)
EP (1) EP0206174B1 (enrdf_load_stackoverflow)
JP (1) JPS6249113A (enrdf_load_stackoverflow)
BR (1) BR8602751A (enrdf_load_stackoverflow)
CA (1) CA1263276A (enrdf_load_stackoverflow)
DE (2) DE3521266A1 (enrdf_load_stackoverflow)
DK (1) DK164928C (enrdf_load_stackoverflow)
ES (1) ES296927Y (enrdf_load_stackoverflow)

Cited By (13)

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US4876972A (en) * 1987-01-21 1989-10-31 Louis Mrklas Grate bar element for a sliding grate furnace for garbage incineration
US5245983A (en) * 1991-02-18 1993-09-21 Noell K+K Abfalltechnik Gmbh Grate bar and grate for combustion plants
KR19990037436A (ko) * 1997-10-29 1999-05-25 야콥 슈티펠 수냉식 추력 연소 격자 상의 고형물을 소각하는 방법 및 이를수행하기 위한 격자판과 격자
WO2000071937A1 (en) * 1999-05-21 2000-11-30 Barlow James L Improved mass fuel combustion system
US6302038B1 (en) * 1996-11-27 2001-10-16 Daewoo Engineering And Construction Corporation Anti-erosion system of grate in stoker-type incinerator
US20030196577A1 (en) * 2002-03-08 2003-10-23 Lefcort Malcolm D. Two-stage wet waste gasifier and burner
WO2006117479A1 (fr) * 2005-05-03 2006-11-09 Saretco Barreau de grille et grille pour foyer a gradins solidaires avec combustion a air dirige
WO2006117478A1 (fr) * 2005-05-03 2006-11-09 Saretco Barreau de grille et grille pour foyer a gradins solidaires
CN100507364C (zh) * 2007-08-01 2009-07-01 重庆科技学院 分段驱动复合式炉排系统
CN102374542A (zh) * 2011-07-25 2012-03-14 福建省丰泉环保控股有限公司 带左自旋转燃烧气流的新型焚烧炉排片
DE102014015916A1 (de) * 2014-10-29 2016-05-04 Steinmüller Babcock Environment Gmbh Roststab und Rost für eine Schubrostfeuerung
US10760787B2 (en) * 2015-06-12 2020-09-01 Hitachi Zosen Inova Ag Grate block for a combustion grate
US20230258333A1 (en) * 2020-09-09 2023-08-17 Hitachi Zosen Inova Ag Grate block with rising nose

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FR2599817A1 (fr) * 1986-06-04 1987-12-11 Mediterranee Const Navales Ind Barreau de grille de combustion ou d'incineration
FR2616885B1 (fr) * 1987-06-17 1989-09-22 Mediterranee Const Navales Ind Barreau de grille de combustion ou d'incineration, notamment de grille a mouvement de recul
JPH0717937Y2 (ja) * 1990-05-21 1995-04-26 日本鋼管株式会社 横型焼却炉の火格子構造
JPH0546813U (ja) * 1991-12-07 1993-06-22 花王株式会社 物品の搬送装置
JPH0624536A (ja) * 1992-07-08 1994-02-01 Nippon Mektron Ltd 搬送用歯付プ−リ
DE19851471A1 (de) * 1998-11-09 2000-05-11 Mitteldeutsche Feuerungs Und U Durchfallarmer Vorschubrostbelag
EP2487414B1 (de) * 2011-02-04 2016-11-02 Seko-Patent GmbH Roststab
KR200471741Y1 (ko) 2013-12-17 2014-03-11 용호금속(주) 소각로용 화격자 유닛

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US1481366A (en) * 1921-11-01 1924-01-22 Herkenrath Francisco Grate bar to burn pulverized coal
US1542910A (en) * 1921-11-25 1925-06-23 Core H Reid Fuel-burning grate
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US2745364A (en) * 1948-10-01 1956-05-15 Martin Johannes Josef Combustion air supply through grates and grate construction
DE970380C (de) * 1955-02-23 1958-09-11 Moeller Johannes Vorrichtung zum Kuehlen von Zementklinker
US3508535A (en) * 1967-06-02 1970-04-28 Johannes Josef Martin Grate
US4240402A (en) * 1978-02-10 1980-12-23 Josef Martin Feuerungsbau Gmbh. Grate for industrial furnaces
JPS5824720A (ja) * 1982-07-12 1983-02-14 Takuma Co Ltd 階段式中空スト−カ
US4463688A (en) * 1982-05-13 1984-08-07 Von Roll Ag. Grate block for a refuse incineration grate
US4671190A (en) * 1984-11-30 1987-06-09 Electricite De France (Service National) Fire grate
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DE600459C (de) * 1934-07-23 Bongard Oscar Roststab
DE547656C (de) * 1932-04-02 Alfred Rossow Vorschubrost mit Unterwindbetrieb mit schraeg nach hinten und oben den Brennstoff foerdernden Rostgliedern, die abwechselnd vor- und zurueckbewegt werden
FR552780A (fr) * 1922-06-12 1923-05-07 Barreau de grille pour brûler surtout du poussier de charbon
DE1301421B (de) * 1967-06-02 1969-08-21 Johannes Josef Dr Ing Rost fuer Grossfeuerungen mit luftgekuehlten Roststaeben
JPS4729807U (enrdf_load_stackoverflow) * 1971-04-26 1972-12-05
ES218773Y (es) * 1975-02-13 1977-01-16 Placa de parrilla para parrillas de refrigeracion y combus- tion.
JPS52101727A (en) * 1976-02-20 1977-08-26 Takuma Co Ltd Step type hollow stoker
JPS5855979Y2 (ja) * 1979-07-24 1983-12-22 東急車輌製造株式会社 排気ブ−ス用均一給気装置
JPS5838274U (ja) * 1981-09-04 1983-03-12 上福　悟 フロ−ト・スイツチを具備した電気ウキ

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US966233A (en) * 1909-05-12 1910-08-02 Carl Nordell Furnace.
US1481366A (en) * 1921-11-01 1924-01-22 Herkenrath Francisco Grate bar to burn pulverized coal
US1542910A (en) * 1921-11-25 1925-06-23 Core H Reid Fuel-burning grate
US2745364A (en) * 1948-10-01 1956-05-15 Martin Johannes Josef Combustion air supply through grates and grate construction
FR1076466A (fr) * 1952-04-28 1954-10-27 Bayer Ag Préparation de soufre
DE970380C (de) * 1955-02-23 1958-09-11 Moeller Johannes Vorrichtung zum Kuehlen von Zementklinker
US3508535A (en) * 1967-06-02 1970-04-28 Johannes Josef Martin Grate
US4240402A (en) * 1978-02-10 1980-12-23 Josef Martin Feuerungsbau Gmbh. Grate for industrial furnaces
US4463688A (en) * 1982-05-13 1984-08-07 Von Roll Ag. Grate block for a refuse incineration grate
JPS5824720A (ja) * 1982-07-12 1983-02-14 Takuma Co Ltd 階段式中空スト−カ
US4672947A (en) * 1982-08-17 1987-06-16 Martin Johannes J E Grate bar for use in industrial furnaces
US4671190A (en) * 1984-11-30 1987-06-09 Electricite De France (Service National) Fire grate

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4876972A (en) * 1987-01-21 1989-10-31 Louis Mrklas Grate bar element for a sliding grate furnace for garbage incineration
US5245983A (en) * 1991-02-18 1993-09-21 Noell K+K Abfalltechnik Gmbh Grate bar and grate for combustion plants
US6302038B1 (en) * 1996-11-27 2001-10-16 Daewoo Engineering And Construction Corporation Anti-erosion system of grate in stoker-type incinerator
KR19990037436A (ko) * 1997-10-29 1999-05-25 야콥 슈티펠 수냉식 추력 연소 격자 상의 고형물을 소각하는 방법 및 이를수행하기 위한 격자판과 격자
US6155184A (en) * 1997-10-29 2000-12-05 Doikos Investments Limited Process for incinerating solids on a water-cooled thrust combustion grate, and a grate plate and grate for accomplishing the process
WO2000071937A1 (en) * 1999-05-21 2000-11-30 Barlow James L Improved mass fuel combustion system
US6655304B1 (en) 1999-05-21 2003-12-02 Barlow Projects, Inc. Mass fuel combustion system
US20030196577A1 (en) * 2002-03-08 2003-10-23 Lefcort Malcolm D. Two-stage wet waste gasifier and burner
US6981455B2 (en) 2002-03-08 2006-01-03 Lefcort Malcolm D Two-stage wet waste gasifier and burner
WO2006117478A1 (fr) * 2005-05-03 2006-11-09 Saretco Barreau de grille et grille pour foyer a gradins solidaires
WO2006117479A1 (fr) * 2005-05-03 2006-11-09 Saretco Barreau de grille et grille pour foyer a gradins solidaires avec combustion a air dirige
FR2885404A1 (fr) * 2005-05-03 2006-11-10 Saretco Sa Barreau de grille et grille pour foyer a gradins solidaires avec combustion a air dirige
FR2885403A1 (fr) * 2005-05-03 2006-11-10 Saretco Sa Barreau de grille et grille pour foyer a gradins solidaires
US20080245355A1 (en) * 2005-05-03 2008-10-09 Andre Simper Grate Bar and Grate for a Step-Grate Stocker with Directed Air Combustion
CN100507364C (zh) * 2007-08-01 2009-07-01 重庆科技学院 分段驱动复合式炉排系统
CN102374542A (zh) * 2011-07-25 2012-03-14 福建省丰泉环保控股有限公司 带左自旋转燃烧气流的新型焚烧炉排片
DE102014015916A1 (de) * 2014-10-29 2016-05-04 Steinmüller Babcock Environment Gmbh Roststab und Rost für eine Schubrostfeuerung
EP3023694A1 (de) 2014-10-29 2016-05-25 Steinmüller Babcock Environment GmbH Roststab und rost für eine schubrostfeuerung
US10760787B2 (en) * 2015-06-12 2020-09-01 Hitachi Zosen Inova Ag Grate block for a combustion grate
US20230258333A1 (en) * 2020-09-09 2023-08-17 Hitachi Zosen Inova Ag Grate block with rising nose
US11808450B2 (en) * 2020-09-09 2023-11-07 Hitachi Zosen Inova Ag Grate block with rising nose

Also Published As

Publication number Publication date
ES296927U (es) 1988-02-16
JPS6249113A (ja) 1987-03-03
DE3521266C2 (enrdf_load_stackoverflow) 1988-12-15
DK276786A (da) 1986-12-14
BR8602751A (pt) 1987-02-10
DK276786D0 (da) 1986-06-12
DK164928B (da) 1992-09-07
CA1263276A (en) 1989-11-28
JPH0359329B2 (enrdf_load_stackoverflow) 1991-09-10
EP0206174A3 (en) 1987-05-13
DE3521266A1 (de) 1986-12-18
DK164928C (da) 1993-01-25
EP0206174B1 (de) 1989-05-24
ES296927Y (es) 1988-11-16
DE3663586D1 (en) 1989-06-29
EP0206174A2 (de) 1986-12-30

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